Joomla! Component AcySMS 3.5.0 CSV Macro Injection

vendor:

AcySMS

by:

Sureshbabu Narvaneni

8.8

CVSS

HIGH

CSV Injection

897

CWE

Product Name: AcySMS

Affected Version From: 3.5.0

Affected Version To: 3.5.1

Patch Exists: YES

Related CWE: CVE-2018-9106

CPE: a:acyba:acysms

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: Ubuntu 14.04 x86_64/Kali Linux 4.12 i686

2018

Joomla! Component AcySMS 3.5.0 CSV Macro Injection

CSV Injection (aka Excel Macro Injection or Formula Injection) exists in the export feature in the Acyba AcySMS extension before 3.5.1 for Joomla! via a value that is mishandled in a CSV export. Login as low privileged user who is having access to AcySMS Component. Rename user name as @SUM(1+1)*cmd|' /C calc'!A0. When high privileged user logged in and exported user data then the CSV Formula gets executed and calculator will get popped in his machine.

Mitigation:

Upgrade to version 3.5.1

Source

Exploit-DB raw data:

# Exploit Title: Joomla! Component AcySMS 3.5.0 CSV Macro Injection
# Google Dork: N/A
# Date: 22-03-2018
################################
# Exploit Author: Sureshbabu Narvaneni
################################
# Vendor Homepage: https://www.acyba.com
# Software Link: https://extensions.joomla.org/extensions/extension/communication/phone-a-sms/acysms/
# Affected Version: 3.5.0
# Category: WebApps
# Tested on: Ubuntu 14.04 x86_64/Kali Linux 4.12 i686
# CVE : CVE-2018-9106

1. Vendor Description:

AcySMS is a component which enables you to send follow-up campaigns,
auto-responders, newsletters, promotions, special offers, automated
messages... via SMS/Text Messages.

2. Technical Description:

CSV Injection (aka Excel Macro Injection or Formula Injection) exists in
the export feature in the Acyba AcySMS extension before 3.5.1 for Joomla!
via a value that is mishandled in a CSV export.

3. Proof Of Concept:

Login as low privileged user who is having access to AcySMS Component.
Rename user name as @SUM(1+1)*cmd|' /C calc'!A0.

When high privileged user logged in and exported user data then the CSV
Formula gets executed and calculator will get popped in his machine.

4. Solution:

Upgrade to version 3.5.1
https://extensions.joomla.org/extensions/extension/communication/phone-a-sms/acysms/


5. Reference:

https://vel.joomla.org/articles/2140-introducing-csv-injection
https://github.com/MrR3boot/CVE-Hunting/blob/master/AcySMS-CSV.mp4



Sureshbabu Narvaneni,
Security Analyst | Bug Hunter,
HackerOne (mrreboot/mrr3boot) | BugCrowd (Mr_R3boot)